14.13.2. Frequency Shift Strategy

Try these first

1. 1.

   What is the primary goal of the Frequency Shift Strategy?

   Hint

   Think about the relationship with earthquakes.

2. 2.

   What happens when ground motion frequency matches a structure's natural frequency?

   Hint

   Recall what resonance means.

3. 3.

   What is the main purpose of the Frequency Shift Strategy?

   • To enhance aesthetics
   • To avoid resonance
   • To increase construction speed

   Hint

   Think about the effects of resonance in structures.

4. 4.

   True or False: Increasing stiffness in a structure will lower its natural frequency.

   • True
   • False

   Hint

   Recall the relationship between stiffness and frequency.

5. 5.

   A building's natural frequency is calculated at 1.0 Hz. What modifications can be made to reduce this frequency to 0.5 Hz, considering the building's materials and design?

   Hint

   Think about the effects of weight and material properties on frequency.

6. 6.

   Explain how base isolation can be effectively used in high-rise buildings to improve seismic performance, including the potential challenges.

   Hint

   Consider both the advantages and the engineering intricacies involved when implementing this strategy.